AJAX

My two constructors are not working any help please

Please support our JavaScript / DHTML / AJAX advertiser: PostgreSQL or MySQL? Compare and contrast the two most popular open source databases

Thread Solved

•

Join Date: Aug 2007

Posts: 47

Reputation: Dio1080 is an unknown quantity at this point

Solved Threads: 0

Dio1080

Offline

Light Poster

My two constructors are not working any help please

Jun 7th, 2009

Hello, my task was to make two constructors for the code that I also posted and they are not working. Can somebody help me figure out why they are not working. I posted them right below.

here are my constructors for course and Faculty

course.js:

 Help with Code Tags 
 javascript Syntax (Toggle Plain Text) 
function Course (name, times, instructorName, instructorDept ) {
this.name = name ||"unknown course name";
this.times = times||"unknown time";
this.instructor = new Faculty(instructorName, instructorDept);
 
this.getname = function();
this.setname = function( name );
 
this.gettimes = function();
this.settimes = function( dept );
 
this.getinstructor() = function();
this.setinstructor(Faculty);
 
this.name.toString = function();
}
 
faculty.js:
function Faculty(name, dept) {
this.name = name || "unknown";
this.dept = dept || "unknown";
 
this.getname = function();
this.setname = function( name );
 
this.getdata = function();
this.setdata = function( dept );
 
this.name.toString = function();
this.dept.toString = function();
}
 
Here is the test file testprob1.js:
 
var fac1 = new Faculty( "Dr. Smith", "Math" );
 
document.writeln( "New faculty: " + fac1.getname() + ", " + fac1.getdept() + "<br>" );
 
document.writeln( "Again: " + fac1 + "<br><br>" );
 
var fac2 = new Faculty();
 
document.writeln( "New faculty: " + fac2.getname() +
 
", " + fac2.getdept() + "<br>" );
 
fac2.setname( "Dr. Jones" );
 
fac2.setdept( "CS" );
 
document.writeln( "Updated: " + fac2.getname() +
 
" " + fac2.getdept() + "<br><br>" );
 
var crs1 = new Course( "COMP322", "MWF 1:00-1:50",
 
"Dr. Green", "CS" );
 
document.writeln( "New course: " + crs1.getname() +
 
", " + crs1.gettimes() +
 
", " + crs1.getinstructor() + "<br>" );
 
document.writeln( "Again: " + crs1 + "<br><br>" );
 
var crs2 = new Course();
 
document.writeln( "New course: " + crs2.getname() +
 
", " + crs2.gettimes() +
 
", " + crs2.getinstructor() + "<br><br>" );
 
crs2.setname( "COMP590" );
 
crs2.settimes( "TR 1:00-2:15" );
 
crs2.setinstructor( fac2 );
 
document.writeln( "Updated: " + crs2.getname() +
 
", " + crs2.gettimes() +
 
", " + crs2.getinstructor() );
function Course (name, times, instructorName, instructorDept ) {
this.name = name ||"unknown course name";
this.times = times||"unknown time";
this.instructor = new Faculty(instructorName, instructorDept);

this.getname = function();
this.setname = function( name );

this.gettimes = function();
this.settimes = function( dept );

this.getinstructor() = function();
this.setinstructor(Faculty);

this.name.toString = function();
}

faculty.js:
function Faculty(name, dept) {
this.name = name || "unknown";
this.dept = dept || "unknown";

this.getname = function();
this.setname = function( name );

this.getdata = function();
this.setdata = function( dept );

this.name.toString = function();
this.dept.toString = function();
}

Here is the test file testprob1.js:

var fac1 = new Faculty( "Dr. Smith", "Math" );

document.writeln( "New faculty: " + fac1.getname() + ", " + fac1.getdept() + "<br>" );

document.writeln( "Again: " + fac1 + "<br><br>" );

var fac2 = new Faculty();

document.writeln( "New faculty: " + fac2.getname() +

", " + fac2.getdept() + "<br>" );

fac2.setname( "Dr. Jones" );

fac2.setdept( "CS" );

document.writeln( "Updated: " + fac2.getname() +

" " + fac2.getdept() + "<br><br>" );

var crs1 = new Course( "COMP322", "MWF 1:00-1:50",

"Dr. Green", "CS" );

document.writeln( "New course: " + crs1.getname() +

", " + crs1.gettimes() +

", " + crs1.getinstructor() + "<br>" );

document.writeln( "Again: " + crs1 + "<br><br>" );

var crs2 = new Course();

document.writeln( "New course: " + crs2.getname() +

", " + crs2.gettimes() +

", " + crs2.getinstructor() + "<br><br>" );

crs2.setname( "COMP590" );

crs2.settimes( "TR 1:00-2:15" );

crs2.setinstructor( fac2 );

document.writeln( "Updated: " + crs2.getname() +

", " + crs2.gettimes() +

", " + crs2.getinstructor() );

The HTML drivers to run the code:

 Help with Code Tags 
 JavaScript / DHTML / AJAX Syntax (Toggle Plain Text) 
<html>
 
<head>
 
<title>Assignment 3, Problem 3</title>
 
<script type="text/javascript" src="faculty.js">
 
</script>
 
<script type="text/javascript" src="course.js">
 
</script>
 
<script type="text/javascript" src="testProb1.js">
 
</script>
 
</head>
 
</html>
<html>

<head>

<title>Assignment 3, Problem 3</title>

<script type="text/javascript" src="faculty.js">

</script>

<script type="text/javascript" src="course.js">

</script>

<script type="text/javascript" src="testProb1.js">

</script>

</head>

</html>

Last edited by Tekmaven; Jun 7th, 2009 at 10:05 pm. Reason: Code Tags

•

Join Date: Aug 2008

Posts: 954

Reputation: essential will become famous soon enough

Solved Threads: 131

essential

Offline

Posting Shark

Re: My two constructors are not working any help please

Jun 8th, 2009

I've shortened out your code and skipped some of the unecessary lines inside the two constructors.

You'll need to run this entire document, to see the actual effects of the two functions.

Here's the code:

 Help with Code Tags 
 JavaScript / DHTML / AJAX Syntax (Toggle Plain Text) 
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
   "http://www.w3.org/TR/html4/loose.dtd">
<html id="html40L" lang="en">
<head>
<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta http-equiv="Content-Script-Type" content="text/javascript">
<title>Live Help!</title>
<style type="text/css">
<!--
p { border-bottom : 2px solid #eee; color : #800080; line-height : 1.6; padding-bottom : .500em; margin-left: .700em; letter-spacing : 3px; margin-top : 2em; white-space : nowrap; }
span { color : #365d95; }
-->
</style>
<script type="text/javascript">
<!--
var Faculty = function( name, dept ) {
   this.name = (( name ) ? name : "undefined " + ( typeof( this ) ) + ": name" );
 
   this.dept = (( dept ) ? dept : "undefined " + ( typeof( this ) ) + ": dept" );
 
   /* Commented Block Started
 
   this.getname = function( name ) { }; // Creating Empty function. And also you forgot to include brackets, so that's why it's messing the whole program.
 
   this.setname = function( name ) { }; 
   
   this.getdata = function() { };
   this.setdata = function( dept ) { };
   this.name.toString = function() { };
   this.dept.toString = function() { };  
  */// Commented Block Ended
};
 
 
var Course = function( name, times, instructorName, instructorDept ) {
var instructor;
   this.name = (( name ) ? name : "undefined " + ( typeof( this ) ) + ": name" );
 
   this.times = (( times ) ? times : "undefined " + ( typeof( this ) ) + ": times" );
 
   this.instructor = new Faculty( instructorName, instructorDept );
 
/* this.getname = function() { };
this.setname = function( name ) { };
 
this.gettimes = function() { };
this.settimes = function( dept ) { };
 
this.getinstructor() = function();
this.setinstructor(Faculty) { };
 
this.name.toString = function() { }; */
 
};
 
// -->
</script>
</head>
<body>
<div id="main">
<script type="text/javascript">
<!-- 
/* Contructor Faculty() Usage Example: */
 
var fac1 = new Faculty("Dr. Smith", "Math" );
 
   document.writeln("\n<p>New Faculty: <span>" + (( fac1.name ) ? fac1.name : fac1["name"] ) + "</span><br>Department: <span>" + (( fac1.dept ) ? fac1.dept : fac1["dept"] ) + "</span><br>" );
 
   document.writeln("Again: <span>" + fac1.name + "</span>, <span>" + fac1.dept + "</span></p>\n" );
 
var fac2 = new Faculty();
   fac2["name"] = "Dr. Jones";
   fac2["dept"] = "CS";
 
   document.writeln("\n<p>New Faculty: <span>" + (( fac2.name ) ? fac2.name : fac2["name"] ) + "</span><br>Department: <span>" + (( fac2.dept ) ? fac2.dept : fac2["dept"] ) + "</span></p>\n" );
 
var crs1 = new Course("COMP332", "MWF 1: 00-1:50", "Dr. Green", "CS" );
 
   document.writeln("<p>New course: <span>" + (( crs1.name ) ? crs1.name : crs1["name"] ) + "</span><br>Time: <span>" + (( crs1.times ) ? crs1.times : crs1["times"] ) + "</span><br>Instructor: <span>" );
 
   document.writeln( crs1.instructor.name + "</span><br>" + "Department: <span>" + crs1.instructor.dept + "</span></p>" ); 
 
// -->
</script>
</div>
</div> 
</body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
   "http://www.w3.org/TR/html4/loose.dtd">
<html id="html40L" lang="en">
<head>
<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta http-equiv="Content-Script-Type" content="text/javascript">
<title>Live Help!</title>
<style type="text/css">
<!--
p { border-bottom : 2px solid #eee; color : #800080; line-height : 1.6; padding-bottom : .500em; margin-left: .700em; letter-spacing : 3px; margin-top : 2em; white-space : nowrap; }
span { color : #365d95; }
-->
</style>
<script type="text/javascript">
<!--
var Faculty = function( name, dept ) {
   this.name = (( name ) ? name : "undefined " + ( typeof( this ) ) + ": name" );

   this.dept = (( dept ) ? dept : "undefined " + ( typeof( this ) ) + ": dept" );
   
   /* Commented Block Started

   this.getname = function( name ) { }; // Creating Empty function. And also you forgot to include brackets, so that's why it's messing the whole program.

   this.setname = function( name ) { }; 
   
   this.getdata = function() { };
   this.setdata = function( dept ) { };
   this.name.toString = function() { };
   this.dept.toString = function() { };  
  */// Commented Block Ended
};


var Course = function( name, times, instructorName, instructorDept ) {
var instructor;
   this.name = (( name ) ? name : "undefined " + ( typeof( this ) ) + ": name" );

   this.times = (( times ) ? times : "undefined " + ( typeof( this ) ) + ": times" );

   this.instructor = new Faculty( instructorName, instructorDept );

/* this.getname = function() { };
this.setname = function( name ) { };

this.gettimes = function() { };
this.settimes = function( dept ) { };

this.getinstructor() = function();
this.setinstructor(Faculty) { };

this.name.toString = function() { }; */

};

// -->
</script>
</head>
<body>
<div id="main">
<script type="text/javascript">
<!-- 
/* Contructor Faculty() Usage Example: */

var fac1 = new Faculty("Dr. Smith", "Math" );

   document.writeln("\n<p>New Faculty: <span>" + (( fac1.name ) ? fac1.name : fac1["name"] ) + "</span><br>Department: <span>" + (( fac1.dept ) ? fac1.dept : fac1["dept"] ) + "</span><br>" );

   document.writeln("Again: <span>" + fac1.name + "</span>, <span>" + fac1.dept + "</span></p>\n" );

var fac2 = new Faculty();
   fac2["name"] = "Dr. Jones";
   fac2["dept"] = "CS";

   document.writeln("\n<p>New Faculty: <span>" + (( fac2.name ) ? fac2.name : fac2["name"] ) + "</span><br>Department: <span>" + (( fac2.dept ) ? fac2.dept : fac2["dept"] ) + "</span></p>\n" );

var crs1 = new Course("COMP332", "MWF 1: 00-1:50", "Dr. Green", "CS" );

   document.writeln("<p>New course: <span>" + (( crs1.name ) ? crs1.name : crs1["name"] ) + "</span><br>Time: <span>" + (( crs1.times ) ? crs1.times : crs1["times"] ) + "</span><br>Instructor: <span>" );

   document.writeln( crs1.instructor.name + "</span><br>" + "Department: <span>" + crs1.instructor.dept + "</span></p>" ); 

// -->
</script>
</div>
</div> 
</body>
</html>